Can we change db block size in Oracle?

Can we change db block size in Oracle?

The DB block size is one of the Oracle system parameters. The default DB block size cannot be changed once the database is created, but multiple DB block sizes can be set up to meet the requirement.

Why we can need different block size for different tablespaces?

Tablespaces with different block sizes than the database exists because of transportable tablespaces, where you want to move the tablespace to a different database that has a different block size than the database you are moving the tablespace from (usually from an OLTP database to a data warehouse).

What is the maximum number of datafiles in Oracle?

By default in every Oracle Database, you can have up to 200 total data files (. DBF files) in each Oracle Database instance as indicated by the value of the parameter “db_files” (you can check the value by running “show parameter db_files” in your database.

What’s the maximum size of an Oracle Database?

The maximum size of the single datafile or tempfile is 128 terabytes (TB) for a tablespace with 32 K blocks and 32 TB for a tablespace with 8 K blocks. A smallfile tablespace is a traditional Oracle tablespace, which can contain 1022 datafiles or tempfiles, each of which can contain up to approximately 4 million (2 22) blocks.

How big is a bigfile table in Oracle?

A bigfile tablespace contains only one datafile or tempfile, which can contain up to approximately 4 billion ( 2 32 ) blocks. The maximum size of the single datafile or tempfile is 128 terabytes (TB) for a tablespace with 32 K blocks and 32 TB for a tablespace with 8 K blocks.

How big can a physical database file be?

2 GB * physical block size (with K/M modifier); 2 GB (without K/M modifier) Operating system dependent. Limited by maximum operating system file size. See the Bigfile Tablespaces and Smallfile (traditional) Tablespaces rows for more information about the maximum database file size in these types of tablespaces.